Just to supplement what @mikkel said here, there is a third method that’s a little bit more streamlined but only works for the recipes that ship with Ladybug Tools for Grasshopper (aka. lbt-recipes).
Method 3: lbt-recipes run (Chris prefers this)
Here are the docs for the command.
It’s very similar to the two other methods @mikkel posted except that you only need the name off the recipe and not the path to a folder with the recipe files. Also, aside from installing Radiance and Python, there are only two steps that you need to get all set up with this workflow:
pip install lbt-dragonfly -U
and then:
pip install lbt-recipes -U
FYI, this is the main page that links to all docs across the entire Ladybug Tools SDK:
https://discourse.ladybug.tools/pub/ladybug-tools-core-sdk-documentation
You will see that lbt-recipes is just one of several libraries that make up the plugin.